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A116278 n times n+9 gives the concatenation of two numbers m and m-2. 4
7040, 487249777145, 512750222847, 684330069116 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..4.

EXAMPLE

7040 * 7049 = 4962//4960, where // denotes concatenation.

CROSSREFS

Cf. A116147, A116271, A116277, A116284.

Sequence in context: A206757 A236061 A317399 * A206050 A116332 A234545

Adjacent sequences:  A116275 A116276 A116277 * A116279 A116280 A116281

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Feb 06 2006

STATUS

approved

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Last modified October 1 08:39 EDT 2020. Contains 337442 sequences. (Running on oeis4.)